Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astro.louisville.edu/software/archive/colorspec/colorspec-1.0/NOTES Дата изменения: Tue Aug 24 01:02:54 2004 Дата индексирования: Thu Feb 27 20:50:15 2014 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п

The C versions are all in one file and a Makefile is unnecessary.
Simply compile with one line such as

gcc -lm solar.c

to generate an executable a.out, and then rename a.out to whatever you prefer.


C language versions accept command line input. Execute a program without
input to get a help prompt.

The Fortran version prompts for input, but is otherwise almost identical to
the C version. It would provide a template if you wanted to create other
Fortran programs with color image output. To compile the Fortran use

g77 solar.f or ifc solar.f

depending on which compiler you prefer. The program is written in standard
f77.


Neither the C nor the Fortran programs here have been optimized for fast
execution, and they appear to run in similar times when processing very
large files. The program "solar" will take several minutes on a
3 GHz Intel Processor PC with 1 GB of memory to process the full Rowland
table because it generates a Lorentzian for each line and integrates over all
contributions to find the flux at each pixel. The program colorspec is
much faster and it simply averages over the flux in the table within the
window of each pixel.

The PPM file format used here is standard ASCII and can be read with an
editor for diagnostics. Most, but not all, image display programs will
accept this format. The conversion to TIF in an image processing program
such as Gimp should be lossless. TIF versions of the sample ppm files
are provided here. The uncompressed JPG versions given here offer
10x smaller file sizes because of the encoding, but with some loss of quality.